A sphere of solid material of relative density 9 has a concentric spherical cavity and Just sinks in water. If the radius of the sphere be R, then the radius of the cavity (r) will be related to R as
see full answer
Your Exam Success, Personally Taken Care Of
1:1 expert mentors customize learning to your strength and weaknesses – so you score higher in school , IIT JEE and NEET entrance exams.
An Intiative by Sri Chaitanya
a
r3=89R3
b
r3=23R3
c
r3=83R3
d
r3=23R3
answer is A.
(Unlock A.I Detailed Solution for FREE)
Best Courses for You
JEE
NEET
Foundation JEE
Foundation NEET
CBSE
Detailed Solution
Weight of the sphere = weight of water displaced43πR3−43πr39×g=43πR3×1×g 9R3−R3=9r3 or 9r3=8R3 ∴ r3=(8/9)R3